Implements permissionless TX serving

[Lucifer0x17]

Adds an admissibility checking mechanism for Arweave transactions, enabling permissionless data serving when routing requests through HyperBEAM nodes.

• Introduces is_tx_admissible to verify the integrity of fetched transactions. This function checks the transaction's content hash or commitment IDs against the expected transaction ID.

Make sure to add the following config to start the routing node:

[
    #{
        <<"template">> => <<"^/arweave/tx">>,
        <<"strategy">> => <<"Random">>,
        <<"choose">> => 10,
        <<"parallel">> => true,
        <<"nodes">> => ?ARWEAVE_BOOTSTRAP_CHAIN_NODES
    },
    #{
        <<"template">> => <<"^/arweave">>,
        <<"nodes">> => ?ARWEAVE_BOOTSTRAP_CHAIN_NODES,
        <<"parallel">> => true,
        <<"admissible-status">> => 200
    }
]

Check dev_arweave:is_admissible_real_gateway_test_ for the whole functioning.